Charging apparatus with v2l and operating method for therof

Abstract

The present invention relates to a charging device providing a V2L function and a method of operation thereof, comprising: a discharge unit provided in a connector installed in a charging port of a vehicle and supplying a discharge current applied from the vehicle's battery to an external electronic device; a charging unit provided in a charger connected to a power plug and converting AC power to supply a charging current to the vehicle; a mode switch for setting either a charging mode or a discharge mode; and a processor corresponding to the setting of the mode switch, which checks the battery charge status of the vehicle, controls the charging unit in the charging mode to apply the charging current to the vehicle, and controls the discharge unit in the discharge mode to supply the discharge current to the electronic device. By using a single charging device, it is possible to not only charge the vehicle's battery but also supply power from the vehicle's battery to an external electronic device, thereby greatly improving user convenience.

Description

Technology Field

[0001] The present invention relates to a charging device that provides a V2L function for charging or discharging a vehicle battery, and a method of operating the same. Background Technology

[0002] Generally, an ICCB is a device for charging electric vehicles using AC power in locations where AC power can be easily supplied, such as residential or commercial buildings.

[0003] The ICCB (Integrated Circuit Breaker) sets the charging current through communication between the vehicle and the ICCB and performs the function of protecting the electric vehicle from accidents during charging. For safety, the ICCB is configured to detect overcurrent or leakage current and cut off the power supply upon detection of overcurrent or leakage current, and is required to obtain international certification for this purpose.

[0004] Meanwhile, the outdoor V2L device can supply battery power from the electric vehicle to external electrical devices.

[0005] To charge an electric vehicle, a slow charger (ICCB) is required, and an outdoor V2L device is needed to use the vehicle's battery power externally.

[0006] Accordingly, users need to have both devices for charging and discharging the electric vehicle battery, and since they must switch between them depending on the situation, there is a problem of reduced convenience.

[0007] A related technology is Korean Patent Publication No. 10-2024-0116159, 'Charging device having variable AC voltage output'. The problem to be solved

[0008] The present invention was created out of the aforementioned necessity, and aims to provide a charging device that provides a V2L function and a method of operation thereof, which charges a vehicle battery and supplies power from the vehicle battery to an electronic device based on the V2L function. means of solving the problem

[0009] To achieve the above-mentioned purpose, a charging device providing a V2L function according to one aspect of the present invention comprises: a discharge unit provided in a connector installed in a charging port of a vehicle and supplying a discharge current applied from the battery of the vehicle to an external electronic device; a charging unit provided in a charger connected to a power plug, converting AC power and supplying a charging current to the vehicle; a mode switch for setting either a charging mode or a discharge mode; and a processor corresponding to the setting of the mode switch, checking the battery charge status of the vehicle, controlling the charging unit in the charging mode to apply the charging current to the vehicle, and controlling the discharge unit in the discharge mode to supply the discharge current to the electronic device.

[0010] The above mode switch is characterized by connecting the CP terminal and the PP terminal of the connector and disconnecting the CP terminal of the charger in the discharge mode, and connecting the CP terminal of the connector and the CP terminal of the charger in the charging mode.

[0011] The above processor is characterized by determining the charging mode when a signal is applied from the CP terminal of the charger, and determining the discharging mode when no signal is applied from the CP terminal of the charger.

[0012] The charging unit comprises a first rectifier circuit that rectifies the AC power; and a second rectifier circuit connected to the connector that rectifies the discharge current, and the processor is characterized by operating with an operating power supplied by being rectified through the first rectifier circuit in the charging mode, and operating with an operating power supplied by being rectified through the second rectifier circuit in the discharging mode.

[0013] It further includes an SMPS connected to the first rectifier circuit and the second rectifier circuit to convert AC power into DC power and supply operating power to the processor; wherein the SMPS converts power applied from the first rectifier circuit in a charging mode and converts power applied from the second rectifier circuit in a discharging mode.

[0014] The invention further includes an LED lamp provided in the connector that outputs a power supply status; and the processor is characterized by causing the LED lamp to light up depending on the connection status of the charging port, whether power is supplied in a charging mode or a discharging mode.

[0015] It is characterized by further including a charging lamp that lights up when the charging mode is set; and a discharge lamp that lights up when the discharge mode is set.

[0016] The apparatus further includes a display that outputs the amount of current for the charging current and the discharge current, wherein the processor calculates the amount of charging current consumed for charging the battery of the vehicle and outputs it through the display when the charging mode is set, and calculates the amount of discharge current supplied from the battery of the vehicle and outputs it through the display when the discharge mode is set.

[0017] A method of operation of a charging device providing a V2L function according to one aspect of the present invention comprises: a step in which, when a connector is connected to a charging port of a vehicle, a processor checks the charging status of the vehicle's battery; a step in which the processor checks one of a charging mode and a discharging mode set by a mode switch; a step in which, in the charging mode, the processor controls a charging unit to convert AC power applied through a power plug so that a charging current is supplied to the vehicle; and a step in which, in the discharging mode, the processor controls a discharging unit to supply a discharging current applied from the vehicle's battery to an external electronic device.

[0018] In the step of checking the above mode, the processor determines the charging mode when a signal is applied from the CP terminal of the charger equipped with the charging unit, and determines the discharging mode when no signal is applied from the CP terminal of the charger.

[0019] In the step of checking the above mode, the mode switch is characterized by connecting the CP terminal and the PP terminal of the connector and disconnecting the CP terminal of the charger when the discharge mode is set, and connecting the CP terminal of the connector and the CP terminal of the charger when the charging mode is set.

[0020] The method further includes: a step in which the processor operates in the charging mode by means of an operating power supplied through a first rectifier circuit that rectifies the AC power; and a step in which the processor operates in the discharging mode by means of an operating power supplied through a second rectifier circuit that rectifies the discharge current.

[0021] After the step of checking the above mode, the processor further includes the step of controlling the LED lamp to light up according to the connection status of the charging port, charging mode, or discharge mode.

[0022] After the step of confirming the above mode, if the charging mode is set, the processor lights up a charging lamp; and if the discharging mode is set, the processor lights up a discharging lamp; further include.

[0023] The method further includes the step of the processor calculating the amount of charging current consumed for charging the battery of the vehicle in the charging mode and outputting it through a display; and the step of the processor calculating the amount of discharging current supplied from the battery of the vehicle in the discharging mode and outputting it through the display.

[0024] In the charging mode or the discharging mode, if any one of overcurrent, leakage current, overvoltage, and overheating is detected through the processor, the method further includes the step of controlling a relay to cut off the power supply; and the step of the processor generating a warning and outputting it through an output unit. Effects of the invention

[0025] According to one aspect, the charging device and method of operation providing the V2L function of the present invention can charge a vehicle battery and supply power from the battery to the outside through a single device, thereby greatly improving user convenience.

[0026] A charging device providing a V2L function and a method of operation thereof according to one aspect of the present invention can stably operate the charging device by utilizing a rectifier circuit that operates in a charging mode and a discharging mode, respectively.

[0027] A charging device providing a V2L function and a method of operation thereof according to one aspect of the present invention can prevent accidents such as fire or electric shock in a vehicle by utilizing the protection function of V2L, and can safely use the battery power of a vehicle. Brief explanation of the drawing

[0028] FIG. 1 is a configuration diagram showing the configuration of a charging device providing a V2L function according to one embodiment of the present invention. FIG. 2 is a block diagram briefly illustrating the control configuration of a charging device providing a V2L function according to one embodiment of the present invention. FIG. 3 is a diagram showing a discharge circuit of a charging device providing a V2L function according to one embodiment of the present invention. FIG. 4 is a diagram showing a charging circuit of a charging device providing a V2L function according to one embodiment of the present invention. FIG. 5 is a figure referenced to explain the operation mode of a charging device providing a V2L function according to one embodiment of the present invention. FIG. 6 is a flowchart illustrating the operation method of a charging device providing a V2L function according to one embodiment of the present invention. Specific details for implementing the invention

[0029] The present invention will be described below with reference to the attached drawings.

[0030] In this process, the thickness of lines or the size of components depicted in the drawings may be exaggerated for the sake of clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intent or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0031] FIG. 1 is a configuration diagram showing the configuration of a charging device providing a V2L function according to one embodiment of the present invention.

[0032] As illustrated in FIG. 1, a charging device (100) providing a V2L function according to one embodiment of the present invention may include a connector (101), a charger (102), and a power plug (103).

[0033] The charging device (100) is connected to an AC power outlet (20) and can charge the vehicle (10) using AC power, and can also supply the discharge current of the vehicle (10) to an external electronic device (30) based on the V2L (Vehicle to Load) function. At this time, the vehicle (10) may include an electric vehicle or a hybrid vehicle.

[0034] The charging device (100) charges the battery of the vehicle (10) based on AC power when the charging mode is set, with the power plug (103) connected to the AC power outlet (20) and the connector (101) connected to the vehicle (10). When the AC power is converted at the charger (102), the charging device (100) can supply the converted charging current to the vehicle (10) through the connector (101).

[0035] At this time, the charging device (100) is illustrated as having a connector (101) and a charger (102) each provided in a body and connected via a cable, but it may also be composed of a single body.

[0036] The charging device (100) can receive AC power when the DC power supplied from the battery of the vehicle (10) is converted into AC, and supply it to a load, such as an electronic device (30).

[0037] When an electronic device (30) is connected to one side of a connector (101) of a vehicle (10) and another electronic device is connected to the other side of a connector (101), the charging device (100) can supply a discharge current supplied from the battery of the vehicle (10) to the electronic device (30) through the connector (101). One side of the connector (101) of the charging device (100) can be connected to the charging port of the vehicle (10). At this time, the electronic device may also be connected to the charging device (100) through a power strip.

[0038] The charging device (100) can convert the magnitude of the discharge current according to the magnitude of the voltage and supply it to the electronic device (30).

[0039] While supplying power to the electronic device (30), the charging device (100) can measure the current and detect leakage current or overcurrent. When leakage current or overcurrent is detected, the charging device (100) can cut off the power supplied from the vehicle (10) to the electronic device (30). Accordingly, the charging device (100) can prevent electric shock accidents or fires caused by leakage current or overcurrent.

[0040] FIG. 2 is a block diagram briefly illustrating the control configuration of a charging device providing a V2L function according to one embodiment of the present invention.

[0041] As illustrated in FIG. 2, the charging device (100) may include a memory (120), a communication unit (130), a sensor (140), a charging unit (150), a discharging unit (160), an input unit (170), an output unit (180), a relay (190), and a processor (110).

[0042] The memory (120) can store data measured through the sensor (140). Additionally, the memory (120) can store at least one of power data, battery data of the vehicle (10), battery charge state data, overcurrent setting data, sensor data, and relay control data.

[0043] The memory (120) can store data regarding at least one of a charging control algorithm, a discharging control algorithm, a voltage conversion algorithm, a leakage current detection algorithm, an overcurrent detection algorithm, a relay control algorithm, a power cutoff algorithm, an input / output data control algorithm, and a warning output algorithm.

[0044] The memory (120) may include storage means such as non-volatile memory, flash memory, etc., such as RAM (Random Access Memory), ROM (ROM), EEPROM (Electrically Erased Programmable ROM).

[0045] The communication unit (130) can transmit and receive data with the vehicle (10) through a connection terminal connected to the charging port of the vehicle (10). The communication unit (130) can communicate with the main controllers of the vehicle (10), such as the VCU (VEHICLE CONTROL UNIT), ECU (ELECTRIC CONTROL UNIT), MCU (MAIN CONTROL UNIT), and BMS (BATTERY MANAGEMENT SYSTEM).

[0046] The communication unit (130) can communicate with the Integrated Charging Control Unit (ICCU) and Vehicle Charging Management System (VCMS) of the vehicle (10). The communication unit (130) may include a driver for CAN (Controller Area Network) communication.

[0047] Additionally, the communication unit (130) may include a wired or wireless communication module to communicate with a vehicle or an external terminal or server. For example, the communication unit (130) may communicate via WAVE (Wireless Access in Vehicular Environment) for communication between a vehicle and road facilities, or V2X (Vehicle to Everything) for communication between vehicles. Additionally, the communication unit (130) may include at least one of short-range communication, mobile communication, and serial communication, such as Ethernet, Wi-Fi, and Bluetooth.

[0048] The sensor (140) may include a plurality of sensor modules. The sensor (140) may include at least one of a current sensor, a voltage sensor, and a temperature sensor.

[0049] For example, the sensor (140) may include at least one of an overcurrent sensor and a leakage current sensor. The overcurrent sensor can transmit an overcurrent detection signal to the processor (110) when a current exceeding a set current value is detected. The overcurrent sensor (141) can detect an overcurrent by obtaining a current smaller than the magnitude of the AC power from the converted AC power when the power supplied from the battery of the vehicle (10) is converted from DC to AC. The leakage current sensor can trip and apply a leakage detection signal to the processor (110) when an imbalance in the AC power applied to the relay occurs. The leakage current sensor can detect zero-sequence current when a ground fault occurs.

[0050] Additionally, the sensor (140) can detect the temperature of the power plug (103) through a temperature sensor and detect the applied voltage through a voltage sensor.

[0051] The charging unit (150) is provided in the charger (102) and converts AC power supplied from the AC power outlet (20) to charge the battery of the vehicle (10).

[0052] The discharge unit (160) is provided in the connector (101) and converts the discharge current supplied from the battery of the vehicle (10) and supplies it to the electronic device (30).

[0053] The charging unit (150) and the discharging unit (160) operate in a charging mode or a discharging mode in response to a control command from the processor (110), and can apply a detection signal to the processor (110) according to the magnitude of the current to maintain or stop charging or discharging. The charging unit (150) and the discharging unit (160) stop charging or discharging when an overcurrent is detected through the sensor (140).

[0054] The input unit (170) includes at least one input means among a switch, a button, and a touchpad. The input unit (170) can set the operating mode of the charging device (100). The input unit (170) may include an operating mode switch (not shown) for setting a charging mode or a discharging mode. The operating mode switch may be installed in the connector (101). Additionally, the input unit (170) may be installed in the charger (102).

[0055] The output unit (180) includes at least one of an LED lamp, a display, and a speaker. The output unit (180) can output data regarding the operating mode, the charging status of the vehicle, and the current, voltage, and power supplied to the load through the display. Additionally, the output unit (180) can output data and warnings regarding overcurrent or leakage current.

[0056] The output unit (180) is installed in the connector (101) and can output the operating status and operating mode through an LED lamp. Additionally, the output unit (180) is installed in the charger (102) and can display data regarding the charging status, charging current, power, and operating mode through a display. For example, the output unit (180) can output the charging mode or discharge mode in a different color through the LED lamp, or output status information regarding at least one of the operating status and warning through the LED lamp. Additionally, the output unit (180) can output data regarding the current, voltage, power amount, and operating mode through a display installed in the charger (102).

[0057] Additionally, the output unit (180) can output sound effects or voice guidance in response to the operation mode and status information through a speaker. The output unit (180) can output a warning sound or voice guidance when leakage current or overcurrent is detected.

[0058] The relay (190) can interrupt the discharge current supplied from the battery of the vehicle (10) in response to a control command from the processor (110). When leakage current or overcurrent occurs, the relay (190) can cut off the power supplied from the battery of the vehicle (10) to the electronic device (30) in accordance with the control command from the processor (110).

[0059] Additionally, the relay (190) can interrupt the charging current supplied to the battery of the vehicle (10) in response to a control command from the processor (110). When an overcurrent occurs, the relay (190) can cut off the power supplied to the battery of the vehicle (10) according to a control command from the processor (110).

[0060] The processor (110) can control the operation of the input unit (170) and the output unit (180), and can control data transmitted and received through the communication unit (130). The processor (110) can store data in memory (120) and manage the data stored in memory (120).

[0061] The processor (110) can set the operating mode of the charging device (100) based on a signal input through the input unit (170). The processor (110) can set a charging mode in which the charging device (100) charges the battery of the vehicle (10) in response to the mode switch setting of the input unit (170), or set a discharge mode in which it supplies operating power to an electronic device (30) using the discharge current supplied from the battery of the vehicle (10).

[0062] When a connector (101) is installed in the charging port of a vehicle (10), the processor (110) detects a connection with the vehicle (10) based on a signal applied from a connection terminal and can receive data regarding the battery from the vehicle (10) through a communication unit (130). The processor (110) can determine the operating state of the connector (101) based on a signal detected by a sensor (140) and output it through an output unit (180).

[0063] In discharge mode, the processor (110) is connected to the vehicle (10) through the connector (101) and can supply the discharge current supplied from the battery of the vehicle (10) to an electronic device (30) connected to the connector (101). The processor (110) can control the power supply to the electronic device (30) in response to the current measured through the sensor (140).

[0064] Additionally, in charging mode, when the charger (102) is connected to an AC power outlet (20) and the connector (101) is connected to the charging port of the vehicle (10), the processor (110) can convert AC power through the charger (102) and supply charging current to the vehicle (10) to charge the battery of the vehicle (10).

[0065] The processor (110) can determine a fault based on the detection signal of the sensor (140) and generate a warning. The processor (110) can control the generated warning to be output to the output unit (180). When the processor (110) receives an overcurrent detection signal or a leakage current detection signal from at least one of the overcurrent sensor (141) and the leakage current sensor (142), it can control a relay to cut off the power. The processor (110) can generate a guide regarding the power cutoff and output it through the output unit (180).

[0066] The processor (110) can check the charge status of the battery of the vehicle (10) through the communication unit (130) and output information regarding the charge status (SOC), voltage, and current through the output unit (180).

[0067] FIG. 3 is a diagram showing a discharge circuit of a charging device providing a V2L function according to one embodiment of the present invention.

[0068] As shown in FIG. 3, the charging device (100) includes a connector (101).

[0069] The connector (101) includes a mode switch (164) and can operate in a charging mode or a discharging mode depending on the setting of the mode switch (164). The mode switch (164) can change the connection of the CP terminal of the connection terminal (162) according to the selected mode.

[0070] For example, the connector (101) operates in a discharge mode when the mode switch (164) is connected to the first terminal (M1), and operates in a charging mode when the mode switch (164) is connected to the second terminal (M2). When the mode switch (164) is connected to the first terminal (M1), the CP terminal is connected to the PP terminal and the latch switch (165) is operated. Additionally, when the mode switch (164) is connected to the second terminal (M2), the CP terminal and the socket-side CP terminal are connected. At this time, the CP terminal is a terminal for monitoring at least one of the connection status of the plug or cable of the electronic device (30), the charging mode, the start and end of charging, and the communication protocol.

[0071] A connector (101) may have a socket (161) provided on one side that can be connected to the charging port of a vehicle (10). The socket (161) can supply a charging current applied from a charger (102) to the vehicle (10) and receive a discharge current output from the battery of the vehicle (10). The connector (101) includes a connection terminal (162) connected to the socket (161), and the connection state of a plurality of terminals provided on the connection terminal (162) can be changed according to a set mode.

[0072] The connector (101) can be connected to an external electronic device (30) through an outlet (163) provided on the other side. The outlet (163) is configured to allow the plug of the electronic device (30) to be inserted and fixed. The connector (101) includes a discharge unit (160) to convert power supplied from the vehicle (10) and supply it to the electronic device (30).

[0073] In charging mode, the connector (101) supplies AC power from the AC power outlet (20) connected via the power plug (103) to the charger (102), and then supplies charging current from the charger (102) to the vehicle (10) through the socket (161). In charging mode, as the CP terminal is connected, the connector (101) can supply charging current supplied from the charger (102) to the vehicle (10) through the socket (161).

[0074] In discharge mode, the connector (101) supplies power to an electronic device (30) connected to an outlet (163) when the current applied through the socket (161) is applied through the connection terminal (162). The charging device (100) can supply power to an external electronic device (30) based on the discharge current output from the battery of the vehicle (10) in discharge mode, based on the V2L function.

[0075] At this time, when the connector (101) of the vehicle (10) is connected to the charging port, the vehicle charge management system (VCMS) provided inside the vehicle (10) can determine the charging mode and the discharging mode of the charging device (100). The vehicle charge management system (VCMS) is provided inside the vehicle (10) and manages the charging and discharging of the battery of the vehicle (10). The vehicle charge management system (VCMS) can perform CP communication with the communication unit (130) of the charging device (100). Based on the connection status of the terminals, the vehicle charge management system (VCMS) checks the connection status between the CP terminal and the PP terminal of the charging device (100), and if the CP terminal and the PP terminal are connected, determines that the charging device (100) is in the discharging mode and controls the discharge current of the battery to be supplied to the charging device (100). The vehicle (10) includes an Integrated Charging Control Unit (ICCU) and, in response to a signal from a Vehicle Charging Management System (VCMS), can convert the DC power of the battery into AC power and supply the converted AC power to a charging device (100).

[0076] The connector (101) may further include an LED lamp. The LED lamp may light up when the connector (101) is connected to the vehicle (10). Additionally, the LED lamp may light up in a different color corresponding to the charging mode or discharging mode of the mode switch (164).

[0077] The sensor (140) can measure the current of the supplied power and detect overcurrent or leakage current. When overcurrent or leakage current is detected, the sensor (140) can apply an overcurrent detection signal or a leakage current detection signal to the processor (110).

[0078] At this time, the processor (110) controls the charging of the battery of the vehicle (10) or the supply of power from the battery to the electronic device (30) according to the setting of the mode switch (164). The processor (110) can cut off the power supply when a leakage current detection signal or an overcurrent detection signal is input from the sensor (140). The processor (110) can cut off the power supply by controlling the mode switch or a separate relay.

[0079] FIG. 4 is a diagram showing a charging circuit of a charging device providing a V2L function according to one embodiment of the present invention.

[0080] As illustrated in FIG. 4, the charging device (100) can charge the battery of the vehicle (10) by including a charger (102).

[0081] One side of the charger (102) may be connected to the connector (101) and the other side may be connected to the power plug (103). The charger (102) may convert power supplied from the power plug (103) and supply it to the vehicle (10) through the connector (101).

[0082] The charger (102) may include a power input terminal (L, N, PE) (154) connected to a power plug (103) and a power output terminal (L, N, PE, CP) (155) connected to a connector (101).

[0083] The charger (102) may include a first rectifier circuit (152), an SMPS (153), an overcurrent sensor (141), a leakage current sensor (142), a power plug temperature sensor (143), a voltage monitoring (156), a relay fusion monitoring (157), a second rectifier circuit (158), relays (191, 192), and a processor (110).

[0084] In charging mode, the first rectifier circuit (152) is connected to the power input terminal (154) into which the power plug (103) is input, and rectifies the power supplied to the SMPS (153). The second rectifier circuit (158) is connected to the power output terminal (155) and rectifies the power supplied from the vehicle (10) in discharge mode. One end of the second rectifier circuit (158) may be connected between the first rectifier circuit (152) and the SMPS (153), and the other end may be connected to the L terminal and N terminal of the power output terminal (155).

[0085] The SMPS (153) converts AC power into DC power. The SMPS (153) can convert power supplied from the first rectifier circuit (152) in charging mode and power supplied from the second rectifier circuit (158) in discharging mode. For example, the SMPS (153) can generate 12V DC power or 5V DC power from AC power. In some cases, the charger (102) may further include an LDO, which is a linear regulator that converts the 12V DC power of the SMPS (153) into 5V DC.

[0086] The overcurrent sensor (141) and the leakage current sensor (142) are connected to the L terminal and N terminal of the AC power source, respectively, to detect current. At this time, the AC power source may include AC power input from the power plug (103) and AC power converted and supplied by the integrated charging system (ICCU) of the vehicle (10).

[0087] The overcurrent sensor (141) and the leakage current sensor (142) input a detection signal for the measured current value to the processor (110). At this time, the overcurrent sensor (141) and the leakage current sensor (142) can measure the current of the AC power source, convert it into a digital signal, and then apply it to the processor (110).

[0088] The processor (110) can operate by receiving power through the first rectifier circuit (152) in charging mode and by receiving power through the second rectifier circuit (158) in discharging mode.

[0089] The processor (110) controls the entire process of converting power applied through the power input terminal (154), monitoring current and voltage, and applying a charging current of a certain size to the power output terminal (155).

[0090] The processor (110) controls the relays (191, 192) to cut off the power supply (charging current or discharging current) in response to a detection signal applied from at least one of the overcurrent sensor (141) and the leakage current sensor (142) when an overcurrent or leakage current is detected. The processor (110) can receive the temperature of the power plug from the power plug temperature sensor (143) and, if the temperature is above a certain level, control the relays (191, 192) to cut off the power supply.

[0091] The processor (110) can monitor the magnitude of the voltage in response to the signal of the voltage monitoring (156) and monitor the malfunction caused by the welding of the relay in response to the signal of the relay welding monitoring (157).

[0092] When the connector (101) is connected to the charging port of the vehicle (10), the processor (110) can determine the mode of the mode switch (164) according to the signal of the CP terminal of the power output terminal (155). In the charging mode, the processor (110) can determine that it is in the charging mode when a signal is applied from the CP terminal of the power output terminal (155) because the CP terminal of the connector (101) is connected to the CP terminal of the power output terminal (155). In the discharging mode, the processor (110) can determine that it is in the discharging mode when a signal is not applied from the CP terminal or its value is 0 because the connection of the CP terminal of the power output terminal (155) is released when the CP terminal is connected to the PP terminal.

[0093] When a charging mode is set according to the operation of the mode switch (164), the processor (110) can control the charger (102) to charge the battery of the vehicle (10). The processor (110) converts the AC power supplied from the power plug (103) into DC power and supplies it to the connector (101) so that the charging current is supplied to the vehicle (10).

[0094] The processor (110) can monitor the state of the charger (102) in response to detection signals from the current sensor, temperature sensor and voltage sensor, and control the relays (191, 192) to cut off the power supply according to any one of overcurrent, leakage current, overvoltage, and overheating.

[0095] At this time, the processor (110) can generate a warning or guidance and output it through the output unit (180) when the power is cut off by the relay (191, 192). The output unit (180) can output a warning or notification in the form of at least one of a warning light, a warning sound, a warning voice, and a warning message in response to a control command of the processor (110).

[0096] FIG. 5 is a figure referenced to explain the operation mode of a charging device providing a V2L function according to one embodiment of the present invention.

[0097] As illustrated in FIG. 5, the charging device (100) may include an input section (170) and an output section (180) in the connector (101) and the charger (102).

[0098] The charging device (100) can set a charging mode or a discharging mode by a mode switch (164) provided in the connector (101) and output status information through an LED lamp (181).

[0099] The mode switch (164) can set the charging mode when the slide (171) is positioned at the first position, the power off when it is positioned at the second position, and the discharge mode when it is positioned at the third position.

[0100] The processor (110) can control the connector (101) and the charger (102) by setting a mode according to a signal applied by the mode switch (164). The processor (110) can control the LED lamp (181) in correspondence with the set mode.

[0101] The LED lamp (181) can be illuminated when the connector (101) is connected to the vehicle (10) and set to a charging mode or a discharging mode. Additionally, the LED lamp (181) can be illuminated in a designated color according to the set mode.

[0102] The charging device (100) can output an operation mode through a display (182), an operation lamp (183, 184), and a power switch (172) provided in the charger (102).

[0103] The power switch (172) turns the charging device (100) on or off. When the power switch (172) is operated, the processor (110) can output the mode and operating status through the display (182) and the operation lamps (183, 184).

[0104] The operation lamps (183, 184) output mode information set by the mode switch (164). The processor (110) controls the charging lamp (183) to light up when the charging mode is set, and the discharge lamp (184) to light up when the discharge mode is set.

[0105] The processor (110) can calculate a charging current or a discharging current according to the mode and output it through the display (182). The display (182) can output a charging current according to the battery charging when the charging mode is set according to the control command of the processor (110), and output a discharging current supplied from the battery when the discharging mode is set.

[0106] The processor (110) may output the state of charge (SOC) of the battery through the display (182). Additionally, the processor (110) may calculate a charge based on the amount of charging current or discharging current and output it through the display (182).

[0107] The processor (110) may generate a warning and output it through the display (182) when at least one of overcurrent, leakage current, overvoltage and overheating is detected.

[0108] FIG. 6 is a flowchart illustrating the operation method of a charging device providing a V2L function according to one embodiment of the present invention.

[0109] As illustrated in FIG. 6, when the charging device (100) is connected to the charging port of the vehicle (10) (S310), the state of the mode switch (164) is checked (S320). The processor (110) can communicate with the vehicle (10) through the communication unit (130) to check the connection status.

[0110] The processor (110) can determine the mode based on the terminal connection status. When the mode switch (164) is set to charging mode, the CP terminal of the internal connector (101) and the CP terminal of the charger (102) are connected. When the mode switch (164) is set to discharging mode, the CP terminal of the internal connector (101) is connected to the PE terminal, and the connection with the CP terminal of the charger (102) is disconnected.

[0111] When the charging mode is set by the mode switch (164) (S330), the processor (110) indicates the charging mode by causing the charging lamp (183) provided in the charger (102) to light up (S340). Additionally, the processor (110) controls the LED lamp (181) provided in the connector (101) to light up.

[0112] The processor (110) receives data from the vehicle (10) through the communication unit (130) and checks the state of charge (SOC) of the battery (S350). The processor (110) determines whether to charge the battery in response to the state of charge. When charging the battery, the processor (110) receives AC power from a power plug (103) connected to a charger (102) (S360).

[0113] The processor (110) converts the AC power supplied from the power plug (103) in the charger (102) into DC power and supplies the charging current to the vehicle (10) through the connector (101) (S370).

[0114] The processor (110) calculates the amount of charging current supplied to the vehicle (10) and displays the amount of charging current through the display (182). The processor (110) may also output the state of charge (SOC) of the battery through the display (182).

[0115] Meanwhile, when the discharge mode is set, the processor (110) causes the discharge lamp (184) provided in the charger (102) to light up to indicate the discharge mode (S390).

[0116] The processor (110) checks the battery charge status of the vehicle (10) through the communication unit (130) (S400). The processor (110) can determine whether a discharge current output is possible based on the battery's state of charge (SOC).

[0117] Meanwhile, the vehicle (10) can check the discharge mode through the connection status of the CP terminal via communication with the communication unit (130). The vehicle charging management system (VCMS) of the vehicle (10) sets the discharge current of the battery to be supplied to the charging device (100). The integrated charging system (ICCU) of the vehicle (10) converts the DC power of the battery into AC power and supplies it to the charging device (100).

[0118] When the discharge current of the vehicle (10) is applied through the socket (161) of the connector (101) (S410), the processor (110) supplies power to the electronic device (30) connected to the outlet (163) (S420). The processor (110) monitors the battery charge state (SOC) of the vehicle (10) to check the discharge state and indicates whether power is being supplied normally to the electronic device (30) through the LED lamp (181) (S430). In addition, the processor (110) can calculate the amount of discharge current and output it through the display (182).

[0119] Accordingly, the charging device (100) can supply power to an electronic device (30) connected to the connector (101) based on the V2L function.

[0120] Accordingly, the charging device providing a V2L function and the method of operation thereof according to one aspect of the present invention can not only charge the vehicle battery using a single charging device but also supply power from the vehicle battery to an external electronic device, thereby significantly improving user convenience. Furthermore, the charging device providing a V2L function and the method of operation thereof according to one aspect of the present invention utilizes a rectifier circuit that operates in charging mode and discharging mode, respectively, so that the charging device can operate stably regardless of the mode, and by utilizing the protection function of V2L, accidents such as vehicle fire or electric shock can be prevented, and the vehicle battery power can be used safely.

[0121] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely illustrative and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the claims below. Explanation of the symbols

[0122] 10: Car 20: AC power 30: Electronic devices 100: Charging device 101: Connector 102: Charger 103: Power plug 110: Processor 120: Memory 130: Communication unit 140: Sensor 141: Overcurrent sensor 142: Leakage current sensor 150: Charging section 152: First rectifier circuit 158: Second rectifier circuit 160: Discharge section 164: Mode Switch 170: Input section 180: Output section 191, 192: Relay

Claims

Claim 1 A charging device providing a V2L function, comprising: a discharge unit provided in a connector installed in the charging port of a vehicle and supplying a discharge current applied from the battery of the vehicle to an external electronic device; a charging unit provided in a charger connected to a power plug, converting AC power and supplying a charging current to the vehicle; a mode switch for setting either a charging mode or a discharge mode; and a processor corresponding to the setting of the mode switch, which checks the battery charge status of the vehicle, controls the charging unit in the charging mode to apply the charging current to the vehicle, and controls the discharge unit in the discharge mode to supply the discharge current to the electronic device; wherein the mode switch is characterized by connecting the CP terminal and the PP terminal of the connector and disconnecting the CP terminal of the charger in the discharge mode, and connecting the CP terminal of the connector and the CP terminal of the charger in the charging mode. Claim 2 delete Claim 3 A charging device providing a V2L function according to claim 1, characterized in that the processor determines the charging mode when a signal is applied from the CP terminal of the charger, and determines the discharging mode when no signal is applied from the CP terminal of the charger. Claim 4 A charging device providing a V2L function according to claim 1, wherein the charging unit includes a first rectifier circuit that rectifies the AC power; and a second rectifier circuit connected to the connector that rectifies the discharge current, and wherein the processor operates by an operating power supplied by rectifying through the first rectifier circuit in the charging mode, and operates by an operating power supplied by rectifying through the second rectifier circuit in the discharging mode. Claim 5 A charging device providing a V2L function according to claim 4, further comprising an SMPS connected to the first rectifier circuit and the second rectifier circuit to convert AC power into DC power and supply operating power to the processor, wherein the SMPS converts power applied from the first rectifier circuit in a charging mode and converts power applied from the second rectifier circuit in a discharging mode. Claim 6 A charging device providing a V2L function according to claim 1, further comprising an LED lamp provided in the connector to output a power supply status; wherein the processor causes the LED lamp to light up depending on the connection status to the charging port, and whether power is supplied in a charging mode or a discharging mode. Claim 7 A charging device providing a V2L function, further comprising: a charging lamp that lights up when the charging mode is set; and a discharge lamp that lights up when the discharge mode is set, in accordance with claim 1. Claim 8 A charging device providing a V2L function according to claim 1, further comprising a display for outputting the amount of current for the charging current and the amount of the discharging current; wherein the processor calculates the amount of charging current consumed for charging the battery of the vehicle and outputs it through the display when the charging mode is set, and calculates the amount of discharging current supplied from the battery of the vehicle and outputs it through the display when the discharging mode is set. Claim 9 A method of operation of a charging device providing a V2L function, comprising: a step in which, when a connector is connected to a charging port of a vehicle, a processor checks the charging status of the battery of the vehicle; a step in which the processor checks one of a charging mode and a discharging mode set by a mode switch; a step in which, in the charging mode, the processor controls a charging unit to convert AC power applied through a power plug so that a charging current is supplied to the vehicle; and a step in which, in the discharging mode, the processor controls a discharging unit to supply a discharging current applied from the battery of the vehicle to an external electronic device; wherein, in the step of checking the mode, the processor determines that it is the charging mode if a signal is applied from the CP terminal of the charger equipped with the charging unit, and determines that it is the discharging mode if a signal is not applied from the CP terminal of the charger. Claim 10 delete Claim 11 A method of operation of a charging device providing a V2L function, characterized in that, in the step of checking the mode, the mode switch connects the CP terminal and the PP terminal of the connector and disconnects the CP terminal of the charger when the discharge mode is set, and connects the CP terminal of the connector and the CP terminal of the charger when the charging mode is set. Claim 12 A method of operation of a charging device providing a V2L function, further comprising: a step in which the processor operates in the charging mode by means of an operating power supplied through a first rectifier circuit that rectifies the AC power; and a step in which the processor operates in the discharging mode by means of an operating power supplied through a second rectifier circuit that rectifies the discharge current. Claim 13 A method of operation of a charging device providing a V2L function, further comprising, in claim 9, a step of, after confirming the mode, controlling the processor to light up an LED lamp according to the connection status of the charging port, charging mode, or discharge mode. Claim 14 A method of operation of a charging device providing a V2L function, further comprising: a step of, after confirming the mode, if the charging mode is set, the step of the processor illuminating a charging lamp; and a step of, if the discharging mode is set, the step of the processor illuminating a discharging lamp. Claim 15 A method of operation of a charging device providing a V2L function, further comprising: a step in which the processor calculates the amount of charging current consumed for charging the battery of the vehicle in the charging mode and outputs it through a display; and a step in which the processor calculates the amount of discharging current supplied from the battery of the vehicle in the discharging mode and outputs it through the display. Claim 16 A method of operation of a charging device providing a V2L function, further comprising: a step of controlling a relay to cut off power when any one of overcurrent, leakage current, overvoltage, and overheating is detected through the processor in the charging mode or the discharging mode; and a step of the processor generating a warning and outputting it through an output unit.

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